"The history of science is full of cases where previously accepted theories and hypotheses have been entirely overthrown, to be replaced by new ideas that more adequately explain the data. While there is an understandable psychological inertia—usually lasting about one generation—such revolutions in scientific thought are widely accepted as a necessary and desirable element of scientific progress. Indeed, the reasoned criticism of a prevailing belief is a service to the proponents of that belief; if they are incapable of defending it, they are well advised to abandon it. This self-questioning and error-correcting aspect of the scientific method is its most striking property, and sets it off from many other areas of human endeavor where credulity is the rule."
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Original Language: English
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Sources
Carl Sagan, Broca's Brain (Ballantine Books, 1979), Ch. 7: "Venus and Dr. Velikovsky" (p. 96)
https://en.wikiquote.org/wiki/Science
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